46 



TABLE 5 



CONSUMPTIVE USE OF WATER BY WILLOWS IN TANK 

 AT SANTA ANA, CALIF., 1930-31 



Year 



Month 



January 



February 



March 



April 



May 



J\me 



July 



August 



September 



October 



November 



December 



inclusive. Since these measurements were made in the open, away 

 from other brush or similar growth, this average probably is 

 greater than would be obtained under normal growth conditions. 

 For the 11 months, indicated loss of water from the Weather Bureau 

 pan was 63.11 inches, which is the equivalent of 44.2 inches of 

 evaporation from a broad water surface. It appears, therefore, 

 that tank-grown willows under these conditions consume a greater 

 quantity of water than is lost from an equal area of water surface 

 by evaporation. 



Bermuda grass . --Bermuda grass ( Cynodon dactyl on ) is a per- 

 ennial with long creeping jointed stolons, often several feet in 

 length. It spreads largely by both stolons and rootstocks, al- 

 though it also seeds abundantly. It is found in many localities 

 in exposed places but not in shade. Bermuda grass is not neces- 

 sarily an indicator of ground water as is saltgrass, but like 

 other plants it makes better growth with increased moisture. It 

 is frequently used for pasture and makes good feed for stock. 



For investigation of consumptive use of water by Bermuda 

 grass an experimental station was established 1 mile east of San 

 Bernardino, in the upper Santa Ana River valley, about 50 miles 



